I am trying to deal with my problem for hours but i have no more ideas what I can do. I want to transfer the mp3 files and jpg files from my PC to BB(8800). I have installed Desktop Manager but I still can't transfer it. I also went to L: (which is a new device that my pc has found which is a BB, but I can't get into it either) It says: Insert disk to L:. Please, help me!

Well, I did everything as it says on the website you gave me, but, as in first option: 3. A pop up box will open, select Open folder to view files using Windows Explorer this window does not pop up, and as in second option: 2. Select Media Manager I do not have anything like media manager shown on my desktop manager.

Well, I did everything as it says on the website you gave me, but, as in first option: 3. A pop up box will open, select Open folder to view files using Windows Explorer this window does not pop up, and as in second option: 2. Select Media Manager I do not have anything like media manager shown on my desktop manager.

you are confusing/mixing instructions from two different options.

Decide first if you want to use Media Manager or not, or Mass Storage Mode.